Java Basic Quiz -3

Java Basics Quiz 3

Time left: 10:00

1. What is the use of the "import" statement in Java?

• To import classes from other packages
• To import data from a database
• To import files from the file system
• To import methods from other classes

2. What is the correct syntax for a single-line comment in Java?

• // comment
• # comment
• /* comment */

3. What is the output of the following code?

                int x = 10;
                int y = 5;
                x *= y;
                System.out.println(x);
            

• 5
• 10
• 15
• 50

4. Which of the following is not an access modifier in Java?

• public
• private
• protected
• internal

5. What is the correct way to declare an array in Java?

• int arr[] = new int[5];
• int arr[];
• int[] arr;
• All of the above

6. Which of the following is used to declare an abstract method in Java?

• void method() {};
• abstract void method();
• void method();
• abstract method();

7. Which of the following is not a valid loop construct in Java?

• for
• while
• do-while
• foreach

8. What is the output of the following code?

                int a = 5;
                int b = 10;
                int c = a + b;
                c += 5;
                System.out.println(c);
            

• 15
• 20
• 25
• 30

9. Which of the following is true about Java?

• Java is a platform-independent language
• Java supports automatic memory management
• Java supports multithreading
• All of the above

10. What is the use of the "this" keyword in Java?

• To refer to the current object
• To refer to the superclass
• To refer to a static method
• To refer to the constructor